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1

Evaluation of regenerative capabilities of piezoelectric fuel injectors

Stoeck Tomasz

Przegląd Komunikacyjny

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2023

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R. 78, nr 9/10

15--20

EN

The article presents the issues related to the regeneration of injectors with piezoelectric actuators, taking into account existing technological constraints and the availability of original spare parts. The range of required maintenance operations among leading manufacturers of fuel systems was compared, as well as the types of diagnostic tests conducted in separate laboratory facilities. Examples of measuring devices, which should be considered as standard and optional equipment in workshops operating in this sector, were provided. Using the results of our own research, it was demonstrated that the regeneration process can be effectively carried out, even when it is necessary to expand existing procedures.

PL

W artykule przedstawiona została problematyka regeneracji wtryskiwaczy z siłownikiem piezoelektrycznym, uwzględniając istniejące ograniczenia technologiczne i dostępność do oryginalnych części zamiennych. Porównano zakres wymaganych czynności obsługowych u czołowych producentów aparatury paliwowej, jak również rodzaje testów diagnostycznych przeprowadzanych na odrębnych stanowiskach laboratoryjnych. Podano przykłady urządzeń pomiarowych, które powinny stanowić standardowe i opcjonalne wyposażenie warsztatów działających w tym sektorze usług. Na przykładzie badań własnych wykazano, że proces regeneracji może być skutecznie prowadzony, nawet przy konieczności rozszerzenia istniejących procedur.

2

The process of regeneration of the coal mills impact wheel

Wolny Ryszard

Mechanik

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2023

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R. 96, nr 2

43--46

EN

The process of regeneration of the coal mills impact wheel being a subassembly of a 360 MW power block was presented. Criteria that qualify the impact wheel for regeneration were discussed. Machining operations, machine tools, special devices and surfacing process were characterized. In order to ensure high quality requirements cutting parameters for selected operations were optimized.

PL

Przedstawiono proces regeneracji koła udarowego młynów węglowych będących podzespołem bloku energetycznego o mocy 360 MW. Omówiono kryteria, które kwalifikują koło udarowe do przeprowadzenia regeneracji. Scharakteryzowano operacje obróbkowe, obrabiarki i przyrządy specjalne oraz proces napawania. Aby zapewnić spełnienie wysokich wymagań jakościowych, zoptymalizowano parametry skrawania dla wybranych operacji.

3

Wybrane problemy rekultywacji kamieniołomów

Naworyta Wojciech

Kruszywa : produkcja - transport - zastosowanie

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2023

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Nr 2

58--65

PL

W artykule omówiono kwestie związane z kierunkami rekultywacji kamieniołomów, a także przedstawiono zakres prac koniecznych do wykonania w ramach likwidacji kopalni.

EN

The article discusses issues related to the directions of quarry reclamation, as well as the scope of works necessary to be performed as part of mine decommissioning.

4

Środowiskowe aspekty prowadzenia działalności w odkrywkowych zakładach górniczych. Problemy wybrane – rekultywacja, sukcesja, kompensacja, cz. I

Naworyta Wojciech

Kruszywa : produkcja - transport - zastosowanie

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2023

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Nr 3

36--39

PL

W artykule poruszono tylko nie - które obszary wpływu górnictwa na środowisko i sposoby jego ogra - niczania. Z racji profilu wydawnic - twa autor ograniczył się do kopalń surowców skalnych. Skupił się na zmianach, jakie w okresie kilku dekad dokonały się w podejściu do rekultywacji terenów poeksplo - atacyjnych, szczególnie w kontek - ście wspierania bioróżnorodności i ochrony gatunków zagrożonych.

EN

The article addresses only some areas of the impact of mining on the environment and methods of its reduction. Due to the profile of the publication, the subjects matter is limited to rock mines. The paper is focused on the changes that have taken place over several decades in the approach to the reclamation of post-mining areas, especially in the context of supporting biodiversity and protecting endangered species.

5

Środowiskowe aspekty prowadzenia działalności w odkrywkowych zakładach górniczych. Problemy wybrane – rekultywacja, sukcesja, kompensacja, cz. II

Naworyta Wojciech

Kruszywa : produkcja - transport - zastosowanie

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2023

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Nr 4

46--51

PL

W artykule poruszono tylko niektóre obszary wpływu górnictwa na środowisko i sposoby jego ograniczania. Z racji profilu wydawnictwa autor ograniczył się do kopalń surowców skalnych. Skupił się na zmianach, jakie w okresie kilku dekad dokonały się w podejściu do rekultywacji terenów poeksploatacyjnych, szczególnie w kontekście wspierania bioróżnorodności i ochrony gatunków zagrożonych.

EN

The article addresses only some areas of the impact of mining on the environment and methods of its reduction. Due to the profile of the publication, the subjects matter is limited to rock mines. The paper is focused on the changes that have taken place over several decades in the approach to the reclamation of post-mining areas, especially in the context of supporting biodiversity and protecting endangered species.

6

Rekultywacja i rewitalizacja Kopalni Wapienia Nielepice – w służbie przyrody i interesów

Ostręga Anna, Cała Marek, Szewczyk-Świątek Anna, Pawłowska Agnieszka, Świątek Wojciech

Kruszywa : produkcja - transport - zastosowanie

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2023

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Nr 2

67--72

PL

W artykule opisano projektowy i formalno-prawny proces rekultywacji Kopalni Wapienia Nielepice. Wskazano, że określenie zakresu i sposobu rekultywacji na podstawie koncepcji rewitalizacji jest korzystnym dla wszystkich wyjściem poza schemat. Ten zabieg, a także dobra współpraca pozwoliły na pełne wykorzystanie przyrodniczych walorów kamieniołomu oraz wskazanie potencjału dla funkcji komercyjnych i publicznych.

EN

The article describes the reclamation of the Nielepice Limestone Mine. It was indicated that defining the scope and method of reclamation on the basis of the revitalization is a non-standard solution, but beneficial for everyone, which, together with good cooperation, serves nature and business.

7

Recycling strategy of green closed-loop supply chain under urban and rural low-carbon planning

Li Menggang, Wang Tianyang

Ecological Chemistry and Engineering. S

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2023

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Vol. 30, nr 4

595--615

EN

The low-carbon ecological city aims to harmonise sustainable urban development with low-emission planning approaches. Emissions from business production processes are central to low-carbon planning. This paper explores three closed-loop supply chain recycling models - manufacturer, retailer, and third-party considering carbon trading and emission reduction technology investment. Respective Stackelberg game models are developed incorporating carbon emission reduction costs, recycling costs, carbon trading price, emission intensity, and recycling price. The influence of these variables on carbon emission reduction and profit is examined through numerical analysis. Results indicate the government’s free carbon quota does not impact perunit carbon reduction or manufacturer profit, nor optimal recycling mode selection. Under specific remanufacturing emission intensity and production cost saving conditions, carbon quota trading can substantially incentivise manufacturers to invest in emission reduction and recycling. With carbon trading and emission reduction technology investment, manufacturer recycling optimises economic and environmental benefits when remanufactured products provide high production cost savings. This fosters sustainable development supporting low-carbon planning.

8

Catalyst regeneration techniques in naphtha reforming: Short review

Gupta Aviral, Gupta S. K.

Chemical and Process Engineering

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2022

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Vol. 43, nr 2

101–-108

EN

Catalytic reforming is an important intermediate in the processing of crude (naphtha in particular) to obtain gasoline. The catalyst used in the process (platinum) is quite expensive and may negatively impact the business if not used judiciously. The aforesaid not only refers to the reduction in loss of the catalyst per unit of gasoline produced but also to the manufacturing of an environmentally friendlier product alongside which is the need of the planet and also a necessity to meet the increasingly strict government norms. In order to meet the above requirements, various refineries around the world use various well-known conventional methods which depend on the quality and quantity of crude manufactured by them. This paper focuses on highlighting recent advancements in methods of catalytic regeneration (CR) in the reforming unit of petroleum industries to produce high octane gasoline, without any major replacements in their existing setup. Research papers formulated by the application of methodologies involving non-linear models and real-time refinery data have only been considered to avoid any deviations/errors in practical applications. In-depth analysis of these papers has led to the origin of some ideas which have been included as suggestions and can be considered as subjects of further research. In all, the objective of the paper is to serve as a reference for researchers and engineers working on devising optimum methods to improve the regeneration of reforming catalysts.

9

The selection of plantings in the process of reclamation and revitalization of post-war damage to the natural environment in the Donbas area

Tkachenko Tetiana, Mileikovskyi Viktor, Ujma Adam, Tkachenko Oleksii

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

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2022

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Vol. 11

163--170

EN

People modify 56% of the Earth’s land. The world trend is changing from rapacious to considered influence such as green construction/production. Nevertheless, the terroristic war of the Russian federation against Ukraine causes the chaotic destruction and snowballing emissions from shell bursts and fires. Reclamation of land should attempt to repair the hugely dangerous influence of this, especially in the temporarily annexed lands of Ukraine. Donbas was one of the most stressed regions due to active mining and other industries, and contained more than 38% of Ukrainian damaged lands. The war deepens the situation. The most natural reconstructive measure is greening. The authors analysed the requirements for greening to gain the maximum benefits. Enduring and effective plant assortments were proposed for the region. For sanitizing the environment, experiments were performed with phytoncide activity using a photographic paper method. It was found and recommend that new phytoncide plants - Japanese quince (Chaenoméles japónica) and barberry (Bérberis) - were most effective.

10

Study on Reclamation of CO2-hardened Sodium Silicate Used Sands by CaO Powder

Lu Jijun, Yang Lei, Qian Jiangbing, He Wei, Wang Huafang

Archives of Foundry Engineering

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2022

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Vol. 22, iss. 3

99--106

EN

Aiming at the problems of wet reclamation consuming a lot of water, dry (mechanical) reclamation having wear and power consumption, this paper to find suitable reclamation reagents to reduce the influence of harmful substances in used sodium silicate sands. By comparing the reclamation effect of CaO, Ca(OH)2 and Ba(OH)2 reclamation powder reagents, it was concluded that CaO had the best reclamation effect. Through the single factor experiment, the influence of CaO on the reclamation effect was explored: 1. addition amount of CaO; 2. the additional amount of water; 3. reclamation time. The orthogonal results showed that the CaO reclamation effect was the best when the amount of CaO was 1.5%, the amount of sodium silicate was 4.0%, the amount of water added was 6.0%, and the reclamation time was 12.0h. In this experiment, 82.2% carbonate and 75.0 % silicate in used sands can be removed. The microscopic analysis of the reclamation sands was carried out by scanning electron microscope (SEM); The surface was relatively smooth, without large area cracks and powder accumulation. Compared with the used sands, the instant, 24h ultimate, and residual strengths of the reclaimed sands were increased by 536.5%, 458.1%, and 89.8%, respectively, which was beneficial to the reclamation of the CO2 sodium silicate used sands.

11

Application of the Triboelectric Method for the Ongoing Assessment of the Quality of Reclaim in Mechanical Reclaimers

Dańko R., Pietrzak A., Gruszka D.

Archives of Foundry Engineering

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2022

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Vol. 22, iss. 2

63--70

EN

The method of the ongoing assessment of the reclaim quality originating from the mechanical reclamation is described in this paper. In the process, the triboelectric system of measuring amounts of dust in the dedusting part of a reclamation device was applied. Based on the online measurements of the amounts of dust generated in the spent sand-reclamation process and the post-process determinations of the ignition losses and granular structures of the removed dust, the proper work parameters of the experimental reclaimer were selected. The allowable value of the ignition losses as well as the main fraction of the reclaimed matrix being similar to fresh sand was assumed as the main criteria of the positive assessment of the process. Within the presented investigations, a periodically operating device for rotor-mechanical reclamation was developed. The possibility of changing the intensity and time of the reclamation treatment as well as the triboelectric system of the dust-amount measuring were applied in this device. Tests were performed for the spent moulding sand with phenol-resol resin Carbophen 5692 hardened by CO2. This sand represents the moulding sand group with a less harmful influence on the surroundings for which the recovery of the quartz matrix utilising the reclamation requires stricter control of the parameters of the reclamation process and reclaim quality.

12

Bashkirian Rugosa (Anthozoa) from the Donets Basin (Ukraine). Part 12. Concluding considerations

Fedorowski Jerzy

Acta Geologica Polonica

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2022

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Vol. 72, no. 3

247--316

EN

A detailed analysis of the upper Viséan, Serpukhovian and Bashkirian Rugosa of the Donets Basin confirms their Mississippian/Pennsylvanian turnover during the Eumorphoceras / Homalophyllites-Hudsonoceras Zone, as postulated earlier (Fedorowski 1981a). The deterioration of rugose corals, globally diverse in time and space in the late Viséan and Serpukhovian, has resulted in the patchy distribution of survivors and newcomers, present in the Bashkirian. Difficulties in inter-basinal communication and the isolation of some sites have resulted in a different content of Bashkirian Rugosa in particular patches, with only rare genera in common. New data has made it possible to document the appearance of the first late Carboniferous genera in the Donets Basin as early as the lower Voznessenkian Horizon (= lower Chokierian Substage), i.e., close to the beginning of the Bashkirian Stage. The two stages of diversification, established in the Bashkirian rugose corals of the Donets Basin, cannot find their counterparts elsewhere. A palaeogeographic overview of the most important sites of diversified rugose corals documents the need to re-examine many taxa, which should be based on complete specimen studies. This and the precise placement of taxa in the modern stratigraphy must be done in order to make rugose corals globally comparable. Simple repetitions of names, commonly used in general summaries, is strongly misleading in both stratigraphic and palaeogeographic reconstructions.

13

Influence of different hard-facing procedures on quality of surfaces of regenerated gears

Nikolić Ružica R., Marković Svetislav, Arsić Dušan, Lazić Vukić, Hadzima Branislav, Ulewicz Robert

Production Engineering Archives

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2021

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Vol. 27, Iss. 4

257--264

EN

During the process of regeneration of machine parts, certain phenomena occur that have a significant impact on the loss of their working ability. Hereditary properties are expressed by the interdependence of geometric and physical-mechanical-metallurgical parameters of gear teeth created during the technological operations of regeneration of worn teeth by hard-facing. The influence of the type of additional material (electrodes and their combinations) on the tribological characteristics of welded gear teeth was considered, whereby the so-called hard additional materials were applied. Those are the additional materials that give the required surface hardness of the teeth without subsequent thermal or thermochemical treatment. This research did not involve the regeneration of specific worn gears removed from machine systems, but the new gears were made, which were then damaged and then regenerated by hard-facing using the shielded metal arc welding (SMAW) procedure. Thus, all the tested gears were made of the same material, belonged to one batch and were machined on the same machines with the same machining regimes. The tests were performed on samples made of 20MnCr5 steel for cementation, on a tribometer by the “block on disc” method, which was designed to simulate the operating conditions of coupled teeth of concrete gears in the exploitation conditions. Based on the conducted tribological tests, the average coefficients of friction and topography of the surfaces were determined by measuring the wear trace and it was defined which additional materials give the best tribological characteristics of the surfaces of gears regenerated by hard-facing.

14

Diatomit - materiał o wielu możliwościach

Szymańska Monika, Kręgiel Dorota

Laboratorium - Przegląd Ogólnopolski

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2021

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nr 2

59--62

PL

Diatomit to ziemia okrzemkowa, naturalny minerał pochodzenia organicznego. Skały okrzemkowe należą do skał osadowych, powstałych w okresie trzeciorzędu i czwartorzędu z pancerzyków jednokomórkowych okrzemek, które osiadły na dnie mórz i jezior. Podstawowym składnikiem diatomitu jest krzemionka SiO2 o różnym stopniu uwodnienia, której towarzyszą niewielkie ilości innych substancji mineralnych. Materiał ten posiada ujemny ładunek elektryczny, stąd zdolność diatomitu do przyciągania różnorodnych cząsteczek, do których należą liczne zanieczyszczenia. Artykuł omawia unikatowe właściwości diatomitu, które mogą być wykorzystane w wielu dziedzinach biogospodarki.

EN

Diatomite is diatomaceous earth, a natural mineral of organic origin. Diatomaceous rocks were formed in the Tertiary and Quaternary periods from the shells of single celled diatoms that settled on the bottom of seas and lakes. The basic component of diatomite is silica SiO2 of various degrees of hydration, with small amounts of other minerals. This mineral material has a negative electric charge, therefore diatomite shows ability to attract various particles, including numerous impurities. The paper discusses the unique properties of diatomite that can be used in many areas of the bioeconomy.

15

Remanufacturing process improvement by image recognition methods. Application of the mechanical part

Kos Mateusz

Journal of TransLogistics

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2021

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Vol. 7, nr 1

147--162

EN

The paper describes the possibility of using, building, and implementing an image recognition system in a company performing remanufacturing processes. It is based on a thesis prepared with the help of Wabco Reman Solutions. The tests were conducted using one of the parts remanufactured by the company – a manifold. The research focuses on different variants of the obtained image recognition models in order to identify differences that may affect their effectiveness and possible application in real work conditions. The environment used to build the models is Jupyter Notebook, and convolutional neural networks were implemented.

PL

W artykule opisano możliwości wykorzystania, budowy i wdrożenia systemu rozpoznawania obrazu w firmie realizującej proces regeneracji. Artykuł powstał na podstawie pracy magisterskiej przygotowanej przy pomocy Wabco Reman Solutions. Przeprowadzone testy zostały wykonane na jednej z regenerowanych części w firmie - kolektorze. W badaniach skupiono się na różnych wariantach powstałych modeli rozpoznawania obrazów w celu dostrzeżenia różnic, które mogą wpłynąć na ich skuteczność i możliwość zastosowania w rzeczywistych warunkach pracy. Do budowy modeli, w których zaimplementowano konwolucyjne sieci neuronowe, wykorzystano środowisko Jupyter Notebook.

16

Analytical Approach for Simulating the Compression and Recovery Behaviour of Nonwoven Fabrics for Automotive Floor-Covering Application under Static Loading

Azami A. A., Payvandy P., Jalili M. M.

Fibres & Textiles in Eastern Europe

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2021

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Vol. 29, no. 4 (148)

62--68

EN

In this study, viscoelastic model parameters are obtained to predict the compression and recovery behaviour of needle-punched nonwoven textiles which are customarily used in industrial applications such as automotive floor-coverings. To this end, two different models are used to explain the compression and recovery behaviour of non-woven textiles under brief, moderate static loading (BMSL) and prolonged, heavy static loading (PHSL) according to ISO 3415 and ISO 3416, respectively. The first model consists of a linear spring and damper set parallel to each other. This combination is placed in series with a linear damper. The second model, however, consists of a linear spring and damper set parallel to each other and placed in series with a nonlinear damper. The results obtained for the compression and recovery behaviour of the non-woven textiles under BMSL and PHSL are compared with experimental results. The results obtained indicated that the nonlinear model is more accurate in the prediction of the compression and recovery behaviour of needle-punched nonwoven textiles under static loading than the linear model. The best result for the prediction of the compression and the recovery behaviour of nonwoven textiles under BMSL and PHSL occurs with the nonlinear model, in which the errors are 4.68% and 4.66%, respectively, when compared to the experimental results.

PL

W pracy podjęto próbę przewidywania zachowania przy ściskaniu i regeneracji igłowanych włóknin używanych w zastosowaniach przemysłowych, takich jak wykładziny podłogowe w samochodach. W tym celu zastosowano dwa różne modele, tak aby wyjaśnić zachowanie włókniny przy ściskaniu i regeneracji przy krótkim, umiarkowanym obciążeniu statycznym (BMSL) i długotrwałym, dużym obciążeniu statycznym (PHSL), odpowiednio, zgodnie z ISO 3415 i ISO 3416. Pierwszy model składał się z liniowej sprężyny i amortyzatora ustawionych równolegle do siebie. Ta kombinacja była umieszczona szeregowo z amortyzatorem liniowym. Drugi model składał się ze sprężyny liniowej i amortyzatora ustawionych równolegle do siebie i połączonych szeregowo z amortyzatorem nieliniowym. Wyniki uzyskane dla zachowania się przy ściskaniu i regeneracji włókniny pod BMSL i PHSL porównano z wynikami eksperymentalnymi. Uzyskane wyniki wskazały, że model nieliniowy jest dokładniejszy w przewidywaniu zachowania przy ściskaniu i regeneracji włóknin igłowanych pod obciążeniem statycznym niż model liniowy. Najlepszy wynik w przewidywaniu ściskania i regeneracji włókniny pod BMSL i PHSL uzyskano dla modelu nieliniowego, w którym błędy wynoszą odpowiednio 4.68% i 4.66% w porównaniu z wynikami eksperymentalnymi.

17

Preparation and preliminary in vivo studies of resorbable polymer modified with allogenic bone chips for guided bone regeneration and orthopedic implants

Szaraniec Barbara, Szponder Tomasz, Gryń Karol, Ambroziak Maciej, Gut Grzegorz, Koperski Łukasz, Chłopek Jan

Engineering of Biomaterials

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2021

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Vol. 24, no. 162

13--19

EN

Composites made of resorbable polylactide modified with bone powder are part of the current search for implantable materials endowed with advantageous biomechanical functions, which make them suitable for orthopedics and traumatology applications. The bone additive containing active bone morphogenetic proteins (BMPs) and calcium phosphates introduced into the polymer matrix is to grant the implant with a biological activity. Subsequently, the resorbable matrix should get replaced with bone tissue. In order to avoid losing the osteoinductive properties of the designed material, it should be processed at low temperatures via physicochemical methods. This paper is devoted to the preparation and optimization of the composite production method suitable for biodegradable polymers and morphogenetic proteins along with the assessment of biocompatibility and biological properties of obtained materials. The tape-casting method was successfully applied. Resorbable polymer (medical poly-L-lactide, Purasorb PL38 by Purac) with 15 wt% of human bone powder (from tissue bank) were used to fabricate PLA-CP/BMPs composite implants. They were tested in in vivo studies that were performed in rabbit bone tissues. The results show a high biocompatibility of the material and good osteointegration with bone tissue.

18

Lipid-polymer nanocarriers for cartilage regeneration

Wytrwal-Sarna Magdalena, Oclon Ewa, Kucharski Mirosław, Szmajnta Katarzyna, Kepczynski Mariusz, Szczubiałka Krzysztof

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

32

19

Gradient scaffolds for the regeneration of osteochondral defects obtained using 3D printing technology

Szczygieł Piotr, Rajzer Izabela

Engineering of Biomaterials

|

2021

|

Vol. 24, no. 163

120

20

Biodegradable tricalcium phosphate/poly(3-hydroxybutyrate) scaffolds for bone tissue regeneration

Skibiński Szymon, Pańtak Piotr, Cichoń Ewelina, Guzik Maciej, Czechowska Joanna, Ślósarczyk Anna, Zima Aneta

Engineering of Biomaterials

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2021

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Vol. 24, no. 163

74